What happens if you reverse the normals in nuke? On Jan 1, 2014 11:44 PM, "Gary Jaeger" <[email protected]> wrote:
> I see. I think. It’s from maya (which is Y up) and vray but I’ll just have > to experiment > > On Jan 1, 2014, at 8:34 PM, Frank Rueter <[email protected]> wrote: > > Well, if you export from a "z up" system you might have to swap the green > and blue channels, and if you are importing from a left handed coordinate > system you will have to invert red I think. > > >>And point positions are worldspace, right? > Depends on what the shader is doing. They might be in camera space. > > > On 02/01/14 17:30, Gary Jaeger wrote: > > Thanks Frank. That’s what I figured but I couldn’t find a combination that > worked right. It would be in invert, and not a swap, right? And point > positions are worldspace, right? > > On Jan 1, 2014, at 7:49 PM, Frank Rueter <[email protected]> wrote: > > That does sound like you need to munge the VRay normals. > I think that is exactly what I did in the past but it's been to long, I > can't remember the details. > > If up is down and left is right, it sounds like you just need to invert > your normals pass' red and green channels. > This could be caused by a z up vs y up coordinate system in your 3D setup > (i.e. 3dsMax) and a left vs right hand coordinate system. > > > > > > On 02/01/14 16:30, Gary Jaeger wrote: > > I’m experimenting with Relight. It’s cool, but it looks to me like > something is reversed. If I put a light that I know should be upper right, > the lower left gets illuminated. Maybe normals reversed or something? these > are passes from vray. Anybody run into this? > > > Gary Jaeger // Core Studio > 249 Princeton Avenue > Half Moon Bay, CA 94019 > 650 728 7060 > http://corestudio.com > > > > _______________________________________________ > Nuke-users mailing [email protected], > http://forums.thefoundry.co.uk/http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > > Gary Jaeger // Core Studio > 249 Princeton Avenue > Half Moon Bay, CA 94019 > 650 728 7060 > http://corestudio.com > > > > _______________________________________________ > Nuke-users mailing [email protected], > http://forums.thefoundry.co.uk/http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > > Gary Jaeger // Core Studio > 249 Princeton Avenue > Half Moon Bay, CA 94019 > 650 728 7060 > http://corestudio.com > > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >
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